Unit 1 Test Practice

Multiple Choice

Factor and Solve

6x² + 17x + 12 = 0

• x = -4/3, x = -3/2

• x = 9, x = 8

• x = 4, x = 3

• x = -4, x = -3

Multiple Choice

Factor and Solve

2x² - 3x - 2 = 0

• x = 1, x = -1

• x = -1/2, x = 2

• x = 1/2, x = 2

• x = 1/2, x = 1

Reorder

What are the steps to solving this by completing the square?

a² + 10a + 21 = 0

• Subtract 21 from both sides of the equation

• Add 25 to both sides of the equation

• Rewrite the left hand side as a (binomial)²

• Take the square root of both sides of the equation

• Subtract 5 from both sides of the equation

1

2

3

4

5

• 1
• 2
• 3
• 4
• 5

Math Response

$$2x^2+8x-7=0$$

Use the quadratic formula to type an expression that will yield the solutions to the equation above.

You cannot type $$\pm$$ on the keyboard so instead put $$+-$$

DO NOT SIMPLIFY ANYTHING. JUST PLUG IN WITH PARENTHESES.

Type answer here

Correct Answer: \frac{-\left(8\right)+-\sqrt{\left(8\right)^2-4\left(2\right)\left(-7\right)}}{2\left(2\right)}

Deg^°

Rad

Multiple Choice

Solve Using the Quadratic Formula
 x² + 4x - 40 = -8

• -10 & -4
• -4 & 10
• -8 & 4
• 8 & -4

Multiple Choice

Solve the following quadratics equation by completing the square...

x² + 4x + 1 = 0

• x = -2 ± √3

• x = -3 ± √2

• x = 2 ± √3

• x = 2 ± √2

Multiple Choice

Solve by finding square roots and simplify completely:
$$x^2-16=0$$

• $$x=\pm16$$  

• $$x=4$$  

• $$x=\pm4$$  

• No real solutions

Multiple Choice

Using your calculator, evaluate i¹³

• -1

• 1

• i

• -i

Multiple Choice

Using your calculator, evaluate i^24

• -1

• 1

• i

• -i

Multiple Choice

What is the simplified form of (–9 + 5i) + (3 – 2i)

*Your calculator can do problems 6 through 8 :)

• –12 + 31i

• –6 + 3i

• –11 + 7i

• 5 – 3i

Multiple Choice

What is the simplifies form of (11 – 7i) – (–3 + 12i)

• 8 – 19i

• 8 + 5i

• 13 – 19i

• 14 –19i

Multiple Choice

What is the simplified form of (–3x + 2i)(x– 4i)

• –3x² + 6xi – 8

• –3x² + 6xi + 8

• –3x² + 14xi – 8

• –3x² + 14xi + 8

Multiple Choice

Simplify -√-8

• -i√8
• -2i√2
• 2i√2
• -8i

Multiple Choice

$$\sqrt{-20}$$  

• $$i\sqrt{20}$$  

• $$-2i\sqrt{5}$$  

• $$20i$$  

• $$-20i$$  

Multiple Choice

An object in launched directly upward at 64 feet per second (ft/s) from a platform 80 feet high. Its height is represented by the equation s(t) = –16t² + 64t + 80. What will be the object's maximum height? 

• 2 ft
• 80 ft
• 144 ft
• 64 ft

Multiple Choice

The function f(t) = -5t²+20t + 60 models the approximate height of an object t seconds after it is launched. How many seconds does it take the object to hit the ground? 

• 4 seconds
• -2 seconds
• -6 seconds
• 9 seconds